Di Indonesia jenis ini di sebut Elang Setiwel dengan nama ilmiah Hieraaetus pennatus berdasarkan List Daftar Burung Indonesia No. 2(Sukmantoro dkk. 2007). Kemudian pada tahun 2007 berdasarkan hasil publikasi pakar taksonomi jenis ini di masukan ke dalam golongan Aquila Eagle dan menjadi Aquila pennata (Harring et al. 2007) dalam tatanan Taksonominya.
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The Booted Eagle (Aquila pennata) formerly is Hieraaetus pennatus is a medium-sized bird of prey. It is about 48 centimetres (19 in) in length and has a wingspan of 120 centimetres (47 in). Like all eagles, it belongs to the family Accipitridae. It breeds in southern Europe, North Africa and across Asia. It is migratory, wintering in Sub-Saharan Africa and South Asia.
There are two relatively distinct plumage forms. Pale birds are mainly light grey with a darker head and flight feathers. The other form has mid-brown plumage with dark grey flight feathers. Recent genetic research resulted in the reclassification of this species to the genus Aquila from Hieraaetus. As it is the type species of Hieraaetus, should any of the hawk-eagles be retained in a distinct genus a new name for that group would be necessary.
